3) Marital status of each member of a randomly selected group of adults is an example of what type of variable?
|
|
- Nancy Carter
- 5 years ago
- Views:
Transcription
1 MATH112 STATISTICS; REVIEW1 CH1,2,&3 Name CH1 Vocabulary 1) A statistics student wants to find some information about all college students who ride a bike. She collected data from other students in her class who ride a bike to school. The following table shows data about their bikes: Color Series Number Weight (lbs) Road Bike Average Speed (mph) Black A Blue B Green C Black D a) How many variables are there? b) What is the sample size? c) What is the population? d) Which variables are quantitative? e) Which variables are qualitative? 2) The average gas mileage of the top selling mini-vans for each U. S. car manufacturer is an example of what type of variable? 3) Marital status of each member of a randomly selected group of adults is an example of what type of variable? 4) Give an example of one categorical variable and one numerical variable. Indicate whether the study described is an observational study or a controlled experiment. WHY? 5) The obesity rates of elementary age children living in urban areas are compared to those living in rural areas to see whether children in urban settings have higher obesity rates. 6) A group of students is divided into two groups. One group is a given a new chewable vitamin and the other group is given a placebo. After six months they are asked to fill out a questionnaire and given a health exam to see whether the new vitamin has health benefits that are better than a placebo. Proportions and Percentages. 7) A recent report showed there were 48 accidents involving pedestrians in City A and 62 accidents involving pedestrians in City B this year. The mayor of City A claims that his city is safer for pedestrians than City B. What information is missing that might contradict this claim? In a study of 900 adults, 45 out of the 325 men in the study said that they preferred to rent a movie on DVD rather than going out to a movie theater. 8) What is the approximate percentage of men in this study who prefer to rent a movie on DVD? 9) What is the approximate percentage of women who participated in this study? 1
2 The two-way table below shows the survey results when sixty adults were asked whether they had made a clothing purchase in the last thirty days. 10) What percentage of the sample had not made a clothing purchase in the past thirty days? 11) Of the adult males surveyed, what percentage had made a clothing purchase in the last thirty days? Correlation. 12) Consider the following statement: "Researchers conducted a large observational study and determined that children who participated in school music programs scored higher on math exams in later grades than those who did not." Suppose that upon hearing this a politician states that all children should participate in school music programs. What is wrong with the politician's statement? A group of 500 patients who suffer from skin cancer were asked to participate in a study to determine the effectiveness of a new medication. The patients were randomly divided into two groups, one that was given the actual medication, and one that received a placebo pill. A good outcome was defined as the cancer being in remission after 6 months of treatment. The results of the study are below. 13) Approximately what percent of patients who took the medication had cancer remission? 14) Was the new medication effective for cancer remission? 15) Can we conclude that the cancer remissions were caused by the new medication? 2
3 CH2 A fitness instructor measured the heart rates of the participants in a yoga class at the conclusion of the class. The data is summarized in the histogram below. There were fifteen people who participated in the class between the ages of 25 and 45. Use the histogram to answer the question. 16) How many participants had a heart rate between 120 and 130 bpm? 17) How many participants had a heart rate between 140 and 150 bpm? 18) What percentage of the participants had a heart rate greater than 130 bpm? 19) What is the approximate percentage of participants that had a heart rate less than 130 bpm? 20) Each day for twenty days a record store owner counts the number of customers who purchase an album by a certain artist. The data and a dotplot of the data are shown below: Data set: 1, 3, 4, 4, 5, 6, 7, 2, 3, 4, 4, 5, 6, 8, 2, 3, 4, 5, 6, 7, 9 Explain some key features of the disytribution. For example Which is the shape? Where is the bulk (center) of the data? Does the data have allot of variation,why? are there any outliers? Construct the dotplot for the given data. 21) The following data represent the number of cars passing through a toll booth during a certain time period over a number of days
4 22) The following histogram represents audience movie ratings (on a scale of 1-100) of 489 movies. What is the typical movie rating given by audiences according to this distribution? 23) What is the typical value for the histogram shown below? 24) The histogram shows the distribution of pitch speeds for a sample of 75 pitches for a college pitcher during one season. Describes the distribution of the histogram below. Shape? Center? 4
5 25) The histogram below is the distribution of heights for a randomly selected Boy Scout troupe. Describes the distribution of the histogram below. Shape? Center? Be able to describe some distributions. Choose the histogram that matches the description. 26) The distribution of heights of adult males tends to be symmetrical with no outliers. A) This distribution is roughly symmetrical and appears to resemble a normal distribution B) This distribution is skewed to the right with no outliers C) This distribution is skewed to the left with what appears to be some outliers 5
6 27) Order the following histograms from least to most variability.. 28) The bar charts below depict the marital statuses of Americans, separated by gender. Which bar chart shows more variability in marital status? Why? Construct a pie chart representing the given data set. 29) The following data give the distribution of the types of houses in a town containing 22,000 houses. House Type Frequency Percentage Cape % Garrison % Split % 6
7 The following double-bar graph illustrates the revenue for a company for the four quarters of the year for two different years. Use the graph to answer the question. 30) In what quarter was the revenue the greatest for Year 1? 31) In what quarter was the revenue the least for Year 2? 32) What was the revenue for the third quarter of Year 1? 7
8 CH3 Find the mean for the given sample data. Unless otherwise specified, round your answer to one more decimal place than that used for the observations. 33) Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mean retirement age ) For the pair of histograms below, determine which distribution has the larger standard deviation. Solve the problem. 35) A class of 20 history students took a quiz worth 100 points. The standard deviation of the scores was 0. What can you say about the scores of the students on this quiz? Use the empirical rule to solve the problem. 36) At one college, GPA's have a distribution that is unimodal and symmetric with a mean of 2.9 and a standard deviation of 0.4 a) What is the range of GPA's from one standard deviation below the mean to one standard deviation above the mean? b) Between what two values would you expect to find 95% of GPA's 37) The mean price of a pound of ground beef in 75 cities in the Midwest is $2.11 and the standard deviation is $0.56. A histogram of the data shows that the distribution is symmetrical. A local Midwest grocer is selling a pound of ground beef for $3.25. What is this price in standard units? Assuming the Empirical Rule applies, would this price be unusual or not? Round to the nearest hundredth. Provide an appropriate response. 38) A television station claims that the amount of advertising per hour of broadcast time has an average of 14 minutes and a standard deviation equal to 2.6 minutes. You watch the station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 11 minutes. Calculate the z-score for this amount of advertising time. Is it unusual? 8
9 Use the following information to answer the question. The distribution of the number of hours of sleep people get per night is unimodal and symmetric with a mean of 6 hours and a standard deviation of 1.5 hours. 39) If James had a z-score of 1.2, explain what this value means in terms of the number of hours of sleep he gets. Find the median for the given sample data. 40) The salaries of ten randomly selected doctors are shown below. $109,000 $109,000 $173,000 $219,000 $241,000 $100,000 $140,000 $808,000 $235,000 $156,000 Determine the interquartile range. 41) Determine the interquartile range. 2, 3, 5, 8, 9, 12, 2, 3, 5, 8, 9, 12 Provide an appropriate response. 42) The annual profits of five large corporations in a certain area are given below. Find the mean and median. Which measure of central tendency should be used? why? $134,000 $142,000 $162,000 $132,000 $1,212,000 Provide an appropriate response. 43) Here are the heights in inches of the male and female employees at First City Bank. Compare the interquartile ranges of the heights of male and female employees. Male Female
10 44) The boxplots below represent movie runtimes (length of a movie in minutes) for movies that have been rated by the Motion Picture Association of America as R, PG-13, PG, and G. List ratings according to their median runtimes, from shortest to longest. Solve the problem. 45) Calculate the five-number summary for the following dataset. and make a boxplot ) Ten parents were asked the ages of their youngest child. The results are shown below What is the IQR for this set of data? 10
11 Answer Key Testname: STAT_CCC_REV1 1) a) 5 b) 4 c) All college students who ride bikes d) weight & speed e) color, series # and road bike 2) Numerical variable 3) Categorical variable 4) Answers will vary. Examples might include: categorical - gender, favorite candy, year in school, favorite color, etc.; numerical - age, height, weight, speed, etc. 5) Observational study, since there is no munipulation of any group 6) Controlled experiment, since we are munipulating one of the groups. 7) The total number of pedestrians in both City A and City B 8) 13.8% 9) 63.9% 10) 35% 11) 50% 12) The politician confused correlation with causation. "Correlation does not imply causation" 13) 67% 14) Yes, a higher percent of patients who took the medication had cancer remissions than the patients who took the placebo. 15) Yes, this is a controlled experiment. Since a higher percent of patients who took the medication had cancer remissions, we can conclude causation. 16) 3 17) 2 18) 53% 19) 47% 20) The dotplot shows that this data has a roughly bell-shaped distribution. The center is around 4, Not allot of variation since most values occur between 3 and 6 over the 20 day spread. no outliers. 21) ) The typical value is about ) Since the data are bimodal, there are two typical values - one is about 20 and the other is about ) The distribution is symmetricc with a mean pitch speed around 93 mph. 25) Skewed left with an outlier. with a median height of about 4 ft. 26) A 27) (iii), (i), (ii) 28) The female bar chart shows more variability because there are more observations in the different categories than there are for males. 29) 30) fourth quarter 31) second quarter 32) $35 million 11
12 Answer Key Testname: STAT_CCC_REV1 33) 60 yr 34) (i) has a larger standard deviation than (ii). 35) Every student received the same score on the quiz. 36) a) 2.5 to 3.3 b) 2.1 to ) z = 2.04; This is unusually expensive ground beef. 38) z = -1.15: No since it is within two standard deviations 39) The number of hours James sleeps is 1.2 standard deviations above the mean. 40) $164,500 41) 6 42) $356,400: $142,000; median since there is an outlier 43) Male: 9 Female: 10 44) G, PG, R, PG-13 45) 34, 39, 52, 63, 79 46) When the values are arranged in order (2, 6, 6, 10, 12, 17, 20, 22, 23, 25), we find that Q3 = 22 and Q1 = 6. Therefore, IQR = Q3 - Q1 = 22-6 =
Math Take Home Quiz on Chapter 2
Math 116 - Take Home Quiz on Chapter 2 Show the calculations that lead to the answer. Due date: Tuesday June 6th Name Time your class meets Provide an appropriate response. 1) A newspaper surveyed its
More informationNOTES: Chapter 4 Describing Data
NOTES: Chapter 4 Describing Data Intro to Statistics COLYER Spring 2017 Student Name: Page 2 Section 4.1 ~ What is Average? Objective: In this section you will understand the difference between the three
More informationUNIVERSITY OF TORONTO SCARBOROUGH Department of Computer and Mathematical Sciences. STAB22H3 Statistics I Duration: 1 hour and 45 minutes
UNIVERSITY OF TORONTO SCARBOROUGH Department of Computer and Mathematical Sciences STAB22H3 Statistics I Duration: 1 hour and 45 minutes Last Name: First Name: Student number: Aids allowed: - One handwritten
More informationMath 2311 Bekki George Office Hours: MW 11am to 12:45pm in 639 PGH Online Thursdays 4-5:30pm And by appointment
Math 2311 Bekki George bekki@math.uh.edu Office Hours: MW 11am to 12:45pm in 639 PGH Online Thursdays 4-5:30pm And by appointment Class webpage: http://www.math.uh.edu/~bekki/math2311.html Math 2311 Class
More informationStat 201: Business Statistics I Additional Exercises on Chapter Chapter 3
Stat 201: Business Statistics I Additional Exercises on Chapter Chapter 3 Student Name: Solve the problem. 1) A sociologist recently conducted a survey of senior citizens who have net worths too high to
More informationDescribing Data: One Quantitative Variable
STAT 250 Dr. Kari Lock Morgan The Big Picture Describing Data: One Quantitative Variable Population Sampling SECTIONS 2.2, 2.3 One quantitative variable (2.2, 2.3) Statistical Inference Sample Descriptive
More informationMATH FOR LIBERAL ARTS REVIEW 2
MATH FOR LIBERAL ARTS REVIEW 2 Use the theoretical probability formula to solve the problem. Express the probability as a fraction reduced to lowest terms. 1) A die is rolled. The set of equally likely
More informationMini-Lecture 3.1 Measures of Central Tendency
Mini-Lecture 3.1 Measures of Central Tendency Objectives 1. Determine the arithmetic mean of a variable from raw data 2. Determine the median of a variable from raw data 3. Explain what it means for a
More information22.2 Shape, Center, and Spread
Name Class Date 22.2 Shape, Center, and Spread Essential Question: Which measures of center and spread are appropriate for a normal distribution, and which are appropriate for a skewed distribution? Eplore
More informationStat 101 Exam 1 - Embers Important Formulas and Concepts 1
1 Chapter 1 1.1 Definitions Stat 101 Exam 1 - Embers Important Formulas and Concepts 1 1. Data Any collection of numbers, characters, images, or other items that provide information about something. 2.
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Exam Name The bar graph shows the number of tickets sold each week by the garden club for their annual flower show. ) During which week was the most number of tickets sold? ) A) Week B) Week C) Week 5
More informationName PID Section # (enrolled)
STT 200 -Lecture 2 Instructor: Aylin ALIN 02/19/2014 Midterm # 1 A Name PID Section # (enrolled) * The exam is closed book and 80 minutes. * You may use a calculator and the formula sheet that you brought
More informationSTAT Chapter 6 The Standard Deviation (SD) as a Ruler and The Normal Model
STAT 203 - Chapter 6 The Standard Deviation (SD) as a Ruler and The Normal Model In Chapter 5, we introduced a few measures of center and spread, and discussed how the mean and standard deviation are good
More informationSTAT Chapter 6 The Standard Deviation (SD) as a Ruler and The Normal Model
STAT 203 - Chapter 6 The Standard Deviation (SD) as a Ruler and The Normal Model In Chapter 5, we introduced a few measures of center and spread, and discussed how the mean and standard deviation are good
More informationAP STAT- Ch Quiz Review
AP STAT- Ch. 3 -- 5 Quiz Review 1) A survey of automobiles parked in the student and staff lots at a large university classified the brands by country of origin, as seen in the table below: Driver Student
More informationInstructor: A.E.Cary. Math 243 Final Exam
Name: Instructor: A.E.Cary Instructions: Show all your work in a manner consistent with that demonstrated in class. Round your answers where appropriate. Use 3 decimal places when rounding answers. The
More informationPutting Things Together Part 1
Putting Things Together Part 1 These exercise blend ideas from various graphs (histograms and boxplots), differing shapes of distributions, and values summarizing the data. Data for 1, 5, and 6 are in
More informationReview Problems for MAT141 Final Exam
Review Problems for MAT141 Final Exam The following problems will help you prepare for the final exam. Answers to all problems are at the end of the review packet. 1. Find the area and perimeter of the
More informationChapter 15: Sampling distributions
=true true Chapter 15: Sampling distributions Objective (1) Get "big picture" view on drawing inferences from statistical studies. (2) Understand the concept of sampling distributions & sampling variability.
More informationCHAPTER 2 Describing Data: Numerical
CHAPTER Multiple-Choice Questions 1. A scatter plot can illustrate all of the following except: A) the median of each of the two variables B) the range of each of the two variables C) an indication of
More informationSHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Exam Name SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. State whether you think that the variables have strong positive correlation, weak positive correlation,
More informationSTT 315 Practice Problems Chapter 3.7 and 4
STT 315 Practice Problems Chapter 3.7 and 4 Answer the question True or False. 1) The number of children in a family can be modelled using a continuous random variable. 2) For any continuous probability
More informationappstats5.notebook September 07, 2016 Chapter 5
Chapter 5 Describing Distributions Numerically Chapter 5 Objective: Students will be able to use statistics appropriate to the shape of the data distribution to compare of two or more different data sets.
More informationSTAT 3090 Test 2 - Version B Fall Student s Printed Name: PLEASE READ DIRECTIONS!!!!
Student s Printed Name: Instructor: XID: Section #: Read each question very carefully. You are permitted to use a calculator on all portions of this exam. You are NOT allowed to use any textbook, notes,
More informationSection3-2: Measures of Center
Chapter 3 Section3-: Measures of Center Notation Suppose we are making a series of observations, n of them, to be exact. Then we write x 1, x, x 3,K, x n as the values we observe. Thus n is the total number
More informationStudy Guide: Chapter 5, Sections 1 thru 3 (Probability Distributions)
Study Guide: Chapter 5, Sections 1 thru 3 (Probability Distributions) Name SHORT ANSWER. 1) Fill in the missing value so that the following table represents a probability distribution. x 1 2 3 4 P(x) 0.09
More informationEdexcel past paper questions
Edexcel past paper questions Statistics 1 Chapters 2-4 (Continuous) S1 Chapters 2-4 Page 1 S1 Chapters 2-4 Page 2 S1 Chapters 2-4 Page 3 S1 Chapters 2-4 Page 4 Histograms When you are asked to draw a histogram
More informationMath 227 Practice Test 2 Sec Name
Math 227 Practice Test 2 Sec 4.4-6.2 Name Find the indicated probability. ) A bin contains 64 light bulbs of which 0 are defective. If 5 light bulbs are randomly selected from the bin with replacement,
More informationName PID Section # (enrolled)
STT 315 - Lecture 3 Instructor: Aylin ALIN 02/19/2014 Midterm # 1 A Name PID Section # (enrolled) * The exam is closed book and 80 minutes. * You may use a calculator and the formula sheet that you brought
More informationExample - Let X be the number of boys in a 4 child family. Find the probability distribution table:
Chapter8 Probability Distributions and Statistics Section 8.1 Distributions of Random Variables tthe value of the result of the probability experiment is a RANDOM VARIABLE. Example - Let X be the number
More informationLecture 2 Describing Data
Lecture 2 Describing Data Thais Paiva STA 111 - Summer 2013 Term II July 2, 2013 Lecture Plan 1 Types of data 2 Describing the data with plots 3 Summary statistics for central tendency and spread 4 Histograms
More informationAP Statistics MidTerm Exam STUDY GUIDE
AP Statistics MidTerm Exam STUDY GUIDE 2008-09 The real exam: covers material from chapters 1-14 Unit III Group Project 40% of grade (these will be presented first during the exam block and will take about
More informationMath146 - Chapter 3 Handouts. The Greek Alphabet. Source: Page 1 of 39
Source: www.mathwords.com The Greek Alphabet Page 1 of 39 Some Miscellaneous Tips on Calculations Examples: Round to the nearest thousandth 0.92431 0.75693 CAUTION! Do not truncate numbers! Example: 1
More informationExample - Let X be the number of boys in a 4 child family. Find the probability distribution table:
Chapter7 Probability Distributions and Statistics Distributions of Random Variables tthe value of the result of the probability experiment is a RANDOM VARIABLE. Example - Let X be the number of boys in
More informationMath 2200 Fall 2014, Exam 1 You may use any calculator. You may not use any cheat sheet.
1 Math 2200 Fall 2014, Exam 1 You may use any calculator. You may not use any cheat sheet. Warning to the Reader! If you are a student for whom this document is a historical artifact, be aware that the
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Ch. 9 Estimating the Value of a Parameter 9.1 Estimating a Population Proportion 1 Obtain a point estimate for the population proportion. 1) When 390 junior college students were surveyed,115 said that
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Midterm Review Name 1) As part of an economics class project, students were asked to randomly select 500 New York Stock Exchange (NYSE) stocks from the Wall Street Journal. As part of the project, students
More information2 Exploring Univariate Data
2 Exploring Univariate Data A good picture is worth more than a thousand words! Having the data collected we examine them to get a feel for they main messages and any surprising features, before attempting
More informationBoth the quizzes and exams are closed book. However, For quizzes: Formulas will be provided with quiz papers if there is any need.
Both the quizzes and exams are closed book. However, For quizzes: Formulas will be provided with quiz papers if there is any need. For exams (MD1, MD2, and Final): You may bring one 8.5 by 11 sheet of
More informationUNIT 10 PRACTICE PROBLEMS
UNIT 10 PRACTICE PROBLEMS 1 3: Represent the following scenarios as ratios in the indicated ways. Then determine if the comparison is part to part or part to whole. 1. In Kate s yoga class, there were
More informationProblem Set 08 Sampling Distribution of Sample Mean
Problem Set 08 Sampling Distribution of Sample Mean MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Find the requested probability. 1) The table reports
More informationMath 227 Elementary Statistics. Bluman 5 th edition
Math 227 Elementary Statistics Bluman 5 th edition CHAPTER 6 The Normal Distribution 2 Objectives Identify distributions as symmetrical or skewed. Identify the properties of the normal distribution. Find
More informationChapter 3. Numerical Descriptive Measures. Copyright 2016 Pearson Education, Ltd. Chapter 3, Slide 1
Chapter 3 Numerical Descriptive Measures Copyright 2016 Pearson Education, Ltd. Chapter 3, Slide 1 Objectives In this chapter, you learn to: Describe the properties of central tendency, variation, and
More informationMATHEMATICAL LITERACY
MATBUS JUNE 2013 EXAMINATION DATE: 7 JUNE 2013 TIME: 14H00 16H00 TOTAL: 100 MARKS DURATION: 2 HOURS PASS MARK: 40% (UC-02) MATHEMATICAL LITERACY THIS EXAMINATION PAPER CONSISTS OF 9 QUESTIONS: ANSWER ALL
More informationAP Statistics Unit 1 (Chapters 1-6) Extra Practice: Part 1
AP Statistics Unit 1 (Chapters 1-6) Extra Practice: Part 1 1. As part of survey of college students a researcher is interested in the variable class standing. She records a 1 if the student is a freshman,
More information4.1 Probability Distributions
Probability and Statistics Mrs. Leahy Chapter 4: Discrete Probability Distribution ALWAYS KEEP IN MIND: The Probability of an event is ALWAYS between: and!!!! 4.1 Probability Distributions Random Variables
More informationChapter 2: Descriptive Statistics. Mean (Arithmetic Mean): Found by adding the data values and dividing the total by the number of data.
-3: Measure of Central Tendency Chapter : Descriptive Statistics The value at the center or middle of a data set. It is a tool for analyzing data. Part 1: Basic concepts of Measures of Center Ex. Data
More informationLecture 1: Review and Exploratory Data Analysis (EDA)
Lecture 1: Review and Exploratory Data Analysis (EDA) Ani Manichaikul amanicha@jhsph.edu 16 April 2007 1 / 40 Course Information I Office hours For questions and help When? I ll announce this tomorrow
More informationChapter 5 The Standard Deviation as a Ruler and the Normal Model
Chapter 5 The Standard Deviation as a Ruler and the Normal Model 55 Chapter 5 The Standard Deviation as a Ruler and the Normal Model 1. Stats test. Nicole scored 65 points on the test. That is one standard
More information1. In a statistics class with 136 students, the professor records how much money each
so shows the data collected. student has in his or her possession during the first class of the semester. The histogram 1. In a statistics class with 136 students, the professor records how much money
More informationLecture 9. Probability Distributions. Outline. Outline
Outline Lecture 9 Probability Distributions 6-1 Introduction 6- Probability Distributions 6-3 Mean, Variance, and Expectation 6-4 The Binomial Distribution Outline 7- Properties of the Normal Distribution
More informationUNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level STATISTICS 4040/01
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level STATISTICS 4040/01 Paper 1 Additional Materials: Answer Booklet/Paper Graph paper (2 sheets) Mathematical
More informationNORMAL RANDOM VARIABLES (Normal or gaussian distribution)
NORMAL RANDOM VARIABLES (Normal or gaussian distribution) Many variables, as pregnancy lengths, foot sizes etc.. exhibit a normal distribution. The shape of the distribution is a symmetric bell shape.
More informationLecture 9. Probability Distributions
Lecture 9 Probability Distributions Outline 6-1 Introduction 6-2 Probability Distributions 6-3 Mean, Variance, and Expectation 6-4 The Binomial Distribution Outline 7-2 Properties of the Normal Distribution
More informationCh 8 One Population Confidence Intervals
Ch 8 One Population Confidence Intervals Section A: Multiple Choice C 1. A single number used to estimate a population parameter is a. the confidence interval b. the population parameter c. a point estimate
More informationAP Statistics MidTerm Exam STUDY GUIDE
AP Statistics MidTerm Exam STUDY GUIDE 2014-15 The real exam: ** covers material from chapters 2-15 Multiple Choice 50% of grade (budget about 60 minutes for this part) - 25 questions - They will be from
More informationMath 243 Lecture Notes
Assume the average annual rainfall for in Portland is 36 inches per year with a standard deviation of 9 inches. Also assume that the average wind speed in Chicago is 10 mph with a standard deviation of
More informationDATA SUMMARIZATION AND VISUALIZATION
APPENDIX DATA SUMMARIZATION AND VISUALIZATION PART 1 SUMMARIZATION 1: BUILDING BLOCKS OF DATA ANALYSIS 294 PART 2 PART 3 PART 4 VISUALIZATION: GRAPHS AND TABLES FOR SUMMARIZING AND ORGANIZING DATA 296
More informationSTAT 3090 Test 2 - Version B Fall Student s Printed Name: PLEASE READ DIRECTIONS!!!!
STAT 3090 Test 2 - Fall 2015 Student s Printed Name: Instructor: XID: Section #: Read each question very carefully. You are permitted to use a calculator on all portions of this exam. You are NOT allowed
More informationExam 1 Review. 1) Identify the population being studied. The heights of 14 out of the 31 cucumber plants at Mr. Lonardo's greenhouse.
Exam 1 Review 1) Identify the population being studied. The heights of 14 out of the 31 cucumber plants at Mr. Lonardo's greenhouse. 2) Identify the population being studied and the sample chosen. The
More informationDensity curves. (James Madison University) February 4, / 20
Density curves Figure 6.2 p 230. A density curve is always on or above the horizontal axis, and has area exactly 1 underneath it. A density curve describes the overall pattern of a distribution. Example
More informationWeek 1 Variables: Exploration, Familiarisation and Description. Descriptive Statistics.
Week 1 Variables: Exploration, Familiarisation and Description. Descriptive Statistics. Convergent validity: the degree to which results/evidence from different tests/sources, converge on the same conclusion.
More informationEdexcel past paper questions
Edexcel past paper questions Statistics 1 Chapters 2-4 (Discrete) Statistics 1 Chapters 2-4 (Discrete) Page 1 Stem and leaf diagram Stem-and-leaf diagrams are used to represent data in its original form.
More informationMathematics 1000, Winter 2008
Mathematics 1000, Winter 2008 Lecture 4 Sheng Zhang Department of Mathematics Wayne State University January 16, 2008 Announcement Monday is Martin Luther King Day NO CLASS Today s Topics Curves and Histograms
More informationMultiple Choice: Identify the choice that best completes the statement or answers the question.
U8: Statistics Review Name: Date: Multiple Choice: Identify the choice that best completes the statement or answers the question. 1. A floral delivery company conducts a study to measure the effect of
More informationChapter 3. Lecture 3 Sections
Chapter 3 Lecture 3 Sections 3.4 3.5 Measure of Position We would like to compare values from different data sets. We will introduce a z score or standard score. This measures how many standard deviation
More informationSTOR 155 Practice Midterm 1 Fall 2009
STOR 155 Practice Midterm 1 Fall 2009 INSTRUCTIONS: BOTH THE EXAM AND THE BUBBLE SHEET WILL BE COLLECTED. YOU MUST PRINT YOUR NAME AND SIGN THE HONOR PLEDGE ON THE BUBBLE SHEET. YOU MUST BUBBLE-IN YOUR
More information2 DESCRIPTIVE STATISTICS
Chapter 2 Descriptive Statistics 47 2 DESCRIPTIVE STATISTICS Figure 2.1 When you have large amounts of data, you will need to organize it in a way that makes sense. These ballots from an election are rolled
More informationSummarising Data. Summarising Data. Examples of Types of Data. Types of Data
Summarising Data Summarising Data Mark Lunt Arthritis Research UK Epidemiology Unit University of Manchester Today we will consider Different types of data Appropriate ways to summarise these data 17/10/2017
More informationTest Bank Elementary Statistics 2nd Edition William Navidi
Test Bank Elementary Statistics 2nd Edition William Navidi Completed downloadable package TEST BANK for Elementary Statistics 2nd Edition by William Navidi, Barry Monk: https://testbankreal.com/download/elementary-statistics-2nd-edition-test-banknavidi-monk/
More informationStat 210 Exam Two. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Stat 210 Exam Two Read these directions carefully. Take your time and check your work. Many students do not take enough time on their tests. Each problem is worth four points. You may choose exactly question
More informationChapter Chapter 6. Modeling Random Events: The Normal and Binomial Models
Chapter 6 107 Chapter 6 Modeling Random Events: The Normal and Binomial Models Chapter 6 108 Chapter 6 109 Table Number: Group Name: Group Members: Discrete Probability Distribution: Ichiro s Hit Parade
More informationExample. Chapter 8 Probability Distributions and Statistics Section 8.1 Distributions of Random Variables
Chapter 8 Probability Distributions and Statistics Section 8.1 Distributions of Random Variables You are dealt a hand of 5 cards. Find the probability distribution table for the number of hearts. Graph
More informationSTAB22 section 1.3 and Chapter 1 exercises
STAB22 section 1.3 and Chapter 1 exercises 1.101 Go up and down two times the standard deviation from the mean. So 95% of scores will be between 572 (2)(51) = 470 and 572 + (2)(51) = 674. 1.102 Same idea
More informationSome estimates of the height of the podium
Some estimates of the height of the podium 24 36 40 40 40 41 42 44 46 48 50 53 65 98 1 5 number summary Inter quartile range (IQR) range = max min 2 1.5 IQR outlier rule 3 make a boxplot 24 36 40 40 40
More informationUnit 2 Statistics of One Variable
Unit 2 Statistics of One Variable Day 6 Summarizing Quantitative Data Summarizing Quantitative Data We have discussed how to display quantitative data in a histogram It is useful to be able to describe
More information100 = % = 25. a = p w. part of the whole. Finding a Part of a Number. What number is 24% of 50? So, 12 is 24% of 50. Reasonable?
12.1 Lesson Key Vocabulary percent A percent is a ratio whose denominator is 100. Here are two examples. 4 4% = 100 = 0.04 25% = 25 100 = 0.25 The Percent Equation Words To represent a is p percent of
More informationMgtOp 215 TEST 1 (Golden) Spring 2016 Dr. Ahn. Read the following instructions very carefully before you start the test.
MgtOp 15 TEST 1 (Golden) Spring 016 Dr. Ahn Name: ID: Section (Circle one): 4, 5, 6 Read the following instructions very carefully before you start the test. This test is closed book and notes; one summary
More informationwork to get full credit.
Chapter 18 Review Name Date Period Write complete answers, using complete sentences where necessary.show your work to get full credit. MULTIPLE CHOICE. Choose the one alternative that best completes the
More informationMutually Exclusive Exhaustive Categories
Activity 1 1.1 Mutually Exclusive Exhaustive Categories As a small group, write a question and 4 to 6 mutually exclusive answers that encompass all possible responses. Make sure that everyone who is asked
More informationFINAL REVIEW 14! (14 2)!2!
Discrete Mathematics FINAL REVIEW Name Per. Evaluate and simplify the following completely, Show all your work. 1. 5! 2. 7! 42 3. 9!4! 3!10! 4. 24!19! 22!21! 5. 4! (7 5)! 6. 46! 45!23 7. 9 5!3! 18 2!4!
More informationMath 120 Introduction to Statistics Mr. Toner s Lecture Notes. Standardizing normal distributions The Standard Normal Curve
6.1 6.2 The Standard Normal Curve Standardizing normal distributions The "bell-shaped" curve, or normal curve, is a probability distribution that describes many reallife situations. Basic Properties 1.
More informationSTATISTICS 4040/23 Paper 2 October/November 2014
Cambridge International Examinations Cambridge Ordinary Level *9099999814* STATISTICS 4040/23 Paper 2 October/November 2014 Candidates answer on the question paper. Additional Materials: Pair of compasses
More informationChapter 3: Displaying and Describing Quantitative Data Quiz A Name
Chapter 3: Displaying and Describing Quantitative Data Quiz A Name 3.1.1 Find summary statistics; create displays; describe distributions; determine 1. Following is a histogram of salaries (in $) for a
More informationNumerical Descriptions of Data
Numerical Descriptions of Data Measures of Center Mean x = x i n Excel: = average ( ) Weighted mean x = (x i w i ) w i x = data values x i = i th data value w i = weight of the i th data value Median =
More informationAP Stats ~ Lesson 6B: Transforming and Combining Random variables
AP Stats ~ Lesson 6B: Transforming and Combining Random variables OBJECTIVES: DESCRIBE the effects of transforming a random variable by adding or subtracting a constant and multiplying or dividing by a
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Chapter 6 Exam A Name The given values are discrete. Use the continuity correction and describe the region of the normal distribution that corresponds to the indicated probability. 1) The probability of
More informationSTAT 113 Variability
STAT 113 Variability Colin Reimer Dawson Oberlin College September 14, 2017 1 / 48 Outline Last Time: Shape and Center Variability Boxplots and the IQR Variance and Standard Deviaton Transformations 2
More informationBusiness Statistics, Cdn. Ed., 3e (Sharpe) Chapter 2: Data. Short Answer - Quiz A
Business Statistics, Cdn. Ed., 3e (Sharpe) Chapter 2: Data Short Answer - Quiz A 1) The mission of a research firm is to "explore the impact of the Internet on families, communities, work, home, and daily
More informationNYC College of Technology Mathematics Department
NYC College of Technology Mathematics Department Revised Fall 2017: Prof. Benakli Revised Spring 2015: Prof. Niezgoda MAT1190 Final Exam Review 1. In 2014 the population of the town was 21,385. In 2015,
More informationEmpirical Rule (P148)
Interpreting the Standard Deviation Numerical Descriptive Measures for Quantitative data III Dr. Tom Ilvento FREC 408 We can use the standard deviation to express the proportion of cases that might fall
More informationMULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
6.1-6.2 Quiz Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the 1) X is a normally distributed random variable with a mean of 11.00. If the probability that
More informationFull download all chapters instantly please go to Solutions Manual, Test Bank site: testbanklive.com
Beginning and Intermediate Algebra 5th Edition Tobey Test Bank Full Download: http://testbanklive.com/download/beginning-and-intermediate-algebra-5th-edition-tobey-test-bank/ MULTIPLE CHOICE. Choose the
More informationCHAPTER 2 DESCRIBING DATA: FREQUENCY DISTRIBUTIONS AND GRAPHIC PRESENTATION
CHAPTER 2 DESCRIBING DATA: FREQUENCY DISTRIBUTIONS AND GRAPHIC PRESENTATION 1. Maxwell Heating & Air Conditioning far exceeds the other corporations in sales. Mancell Electric & Plumbing and Mizelle Roofing
More informationSTATISTICAL DISTRIBUTIONS AND THE CALCULATOR
STATISTICAL DISTRIBUTIONS AND THE CALCULATOR 1. Basic data sets a. Measures of Center - Mean ( ): average of all values. Characteristic: non-resistant is affected by skew and outliers. - Median: Either
More informationChapter 3. Descriptive Measures. Copyright 2016, 2012, 2008 Pearson Education, Inc. Chapter 3, Slide 1
Chapter 3 Descriptive Measures Copyright 2016, 2012, 2008 Pearson Education, Inc. Chapter 3, Slide 1 Chapter 3 Descriptive Measures Mean, Median and Mode Copyright 2016, 2012, 2008 Pearson Education, Inc.
More informationPlease show work for all calculated answers. Show work in a neat and organized manner.
Math 083 Review for Final Exam Name Please show work for all calculated answers. Show work in a neat and organized manner. 1) Using the frequency table for a monthly budget, find all of the relative frequencies
More informationExploratory Data Analysis
Exploratory Data Analysis Stemplots (or Stem-and-leaf plots) Stemplot and Boxplot T -- leading digits are called stems T -- final digits are called leaves STAT 74 Descriptive Statistics 2 Example: (number
More informationChapter 6. y y. Standardizing with z-scores. Standardizing with z-scores (cont.)
Starter Ch. 6: A z-score Analysis Starter Ch. 6 Your Statistics teacher has announced that the lower of your two tests will be dropped. You got a 90 on test 1 and an 85 on test 2. You re all set to drop
More informationThe Normal Distribution
Stat 6 Introduction to Business Statistics I Spring 009 Professor: Dr. Petrutza Caragea Section A Tuesdays and Thursdays 9:300:50 a.m. Chapter, Section.3 The Normal Distribution Density Curves So far we
More information